Machine for winding toroidal television vertical deflection coils



Apnl 7, 1964 R. FAHRBACH 3,128,056

MACHINE FOR WINDING TOROIDAL TELEVISION VERTICAL DEFLECTION COILS Filed March 2, 1962 3 Sheets-Sheet 1 INVENTOR PUDOLF FAHFEBA CH 3 BY v) ATTORNEY 3 Sheets-SheetZ FAHRBACH MACHINE FOR WINDING TOROIDAL TELEVISION VERTICAL DEFLECTION COILS INVENTOR.

RuDoLF FA HR BACH ATTORNEY April 7, 1964 Filed March 2, 1962 Aprll 7, 1964 R. FAHRBACH 3,128,056

MACHINE FOR WINDING TOROIDAL TELEVISION I VERTICAL DEFLECTION cons Filed March 2, 1962 3 Sheets-Sheet 3 P0: A r74 U; 1 M J i ATTORNEY.

United States Patent Ofiiice 3,128,056 Patented Apr. 7, 1964 3,123,056 MACHINE FOR WHNDENG T QROIDAL TELEVISION VERTICAL DEFLECTIQN COHLS Rudolf Fahrbach, Union, NIL, assignor to Universal Manufacturing (30., Inn, Hrvington, N.J., a corporation of New Jersey Filed Mar. 2, 1962, Ser. No. 177,065 8 Claims. (Ci. 242-9) This invention is a machine for simultaneously winding two or more symmetrically curved core sections of one or more toroidal television vertical deflection coils.

Heretofore, the sections of each such coil were obtained by diametrically splitting a core into two halves as accurately as possible. The individual sections were then wound with superimposed layers of wire, of successively greater or less axial length to minimize electrical resistance to current flow. The thus individually wound sections were then assembled to form the end product coil.

According to the present invention, the core is split, as before, but the resulting sections of that particular core are mounted on and supported by a common arbor, the movements of which produce identical movement of the complementary core sections during the winding thereof by synchronized wire feeding winding flier arms. 7

With this arrangement and mode of operation, the windings of the complementary core sections will be identical in all respects, both physically and from the standpoint of electrical characteristics. When they are assembled to produce the end product coil they are therefore bound to function with maximum efliciency, irrespective of the number of layers of wire on said coil.

Another feature of the invention resides in the fact that the common arbor is made readily demountable. While the core sections of one arbor are being wound, complementary core sections to be subsequently wound may be applied to a duplicate arbor. This latter preloaded arbor, with core sections attached, may be substituted for the one in the machine as soon as the wind ing of the core sections of the latter is completed. The operations of the machine need be only momentarily suspended during this substitution and thus production is substantially continuous.

Still another feature consists in a novel form of clamp for mounting the core sections on the common arbor in identical predetermined positions thereon, so as to insure proper cooperative relation with the winding flier arms for each successive arbor placed in the machine.

An important feature of the present machine is that the complementary core sections of a plurality of toroidal cores may be mounted in spaced apart positions on and longitudinally of the number of flier arms. By so doing, the output of the machine for any particular time period is greatly increased.

Features of the invention, other than those adverted to, will be apparent from the hereinafter detailed description and appended claims, when read in conjunction with the accompanying drawings.

The accompanying drawings illustrate one practical embodiment of the invention, but the construction therein shown is to be understood as illustrative, only, and not as defining the limits of the invention.

FIG. 1 is a schematic view showing the different operating parts of the machine.

FIG. 2 is a front elevation of the machine.

FIG. 3 is a vertical section on the line 3-3 of FIG. 2.

FIG. 4 is a fragmental perspective showing the common arbor with two core sections supported thereon and winding mechanism associated with each core section.

, In the accompanying drawings, 1 designates the frame of the machine which, in practice, may be of any suitable form. Mounted on this frame are hollow horizontal shafts 2 which are parallel to one another and are spaced apart. Any number of these shafts may be mounted on the frame, all in parallel spaced apart relation, depending upon the number of core sections it is desired to wind at any particular time. However, for the purpose of illustration, two such shafts are shown. On the inner end of each of said shafts is rigidly aflixed a flier arm 3 of bowed form. Each of these arms is counterbalanced 'as shown at 4 and at the free end/of each arm is a tube 5. The wire W to be used in/wifiding the cores is fed through a funnew (FIGS. 1 and 3) to and through each h shaft 2 and over directional pulleys 7, 8 a: to the outer end of the tube 5 from whence it'passes directly to the corresponding core section. I i i The flier arms 3 are adapted to be simultaneously rotated about the axis of the hollow shafts 2. Any suitable means may be utilized to effect this rotation. However, for the purpose of concrete illustration, I have shown on each of said hollow shafts a worm gear 10. These worm gears mesh with worm gears 12, mounted on a shaft 13. Intermediate the two hollow shafts 2, the shaft 13 carries a gear 14 which is driven through a gear 15 fixed on a stub shaft 16. This stub shaft 16 carries a pulley 17 cooperating with a belt 18 which passes around another pulley 19 driven from a gear box 20, as shown best in FIGS. 1 and 3. The gears of the box 2% are driven by a motor 21 (FIG. 1). All belts employed are preferably of the knobbed type which assure positive drive of gear-like pulleys.

With the arrangement described, the shafts 2 are caused to rotate at the same speed and to carry with them the flier arms 3, so that the free ends of the tubes 5 rotate about definite predetermined circular paths, as indicated by the annular series of arrows 22 in FIG. 4. As shown in the drawings both of these flier arms rotate in the same counterclockwise direction. However, in practice they may both be driven in a clockwise direction or they may be driven to rotate in opposite directions without departing from this invention.

Mounted forwardly of the flier arms 3 is the common arbor 23 which constitutes an important feature of this invention. This arbor is parallel to the shaft 13. It is attached at one end to a counterbalanced crank 24 through the medium of a quick change twist lock attaching sleeve 27 which, through the manual operation of a knob 23, may be caused instantly grip or release that end of the arbor. The crank 24 is fixed to a shaft 25, supported in bearings 26.

The opposite end of the arbor 23 is detachably supported on a link 29, pivoted at 30 to a post 31 secured to the frame of the machine. Of the outboard bearing for the arbor 23, the part above the double lines is the upper half of the bearing which is carried by the link 2?, while the part below the double lines is the detachable lower half of the bearing which can be readily detached from the upper half to permit the link 29 to be swung back out of the Way, so that the arbor may be withdrawn from the chuck at the left after said chuck has been operated to release the arbor. The lower removable half of the bearing may be secured in place by a thumb nut or in any other appropriate manner as will be readily understood by any machinist. This type of mounting permits the arbor to partake of oscillatory movement about the common axes of the shaft 25 and the pivot 30. At the same time this arbor may be quickly detached and another arbor of the same kind substituted thereof.

Mounted upon the common arbor 23 are core section clamps 32. These clamps are spaced apart a distance substantially equal to the spacing apart of the hollow 9 a shafts 2, so that core sections C, adapted to be supported by said clamps, are alined with the axes of said shafts 2.

Each of these clamps comprises a split sleeve 33, from which rigidly project pins which rigidly secure a fixed clamping jaw 34 is spaced relation to the sleeve. Mounted on these pins intermediate the sleeve and the member 34 is a movable jaw 35. The contiguous faces of the fixed jaw 34 and the movable jaw 35 are shaped to conform to the cross sectional shape of a core and, when a core is placed therein, a threaded clamping screw 36 may be manipulated to force the movable jaw 35 in the direction of the fixed jaw 34 to thus rigidly clamp the core section between them.

In practice the shaft 25 is oscillated back and forth to oEiilage the common arbor 23 about the axis of said shaft, so that, as indicated in FIG. 3, said arbor moves from substantially the full line position shown therein to the dotted line position thereof. -In winding a core of the pyramidal type, i.e., one wherein the successive layers of winding are progressively longer in an axial direction, the degree of oscillation of this arbor may be somewhere between 8 and 120 degrees, depending upon the number of layers of winding and the pyramidal effect desired.

In any event the operations of the parts of the machine so far described, are so coordinated and synchronized that the feed of the wire to each core section will be at all times such that the center of curvature of the core section will be in substantial alinement with the corresponding drive shaft 2, so that the wire is wrapped about each section in a spiral manner with the consecutive convolutions of the wire contacting with one another. The oscillatory movement of the arbor is so adjusted as to bring about this result. In this machine the wire is drawn from supply spools through the operation of winding such wire upon the several cores so that tight wrapping of the wire of each layer is assured.

(The several parts of the apparatus thus far described may be caused to function as stated through the employ-ment of any suitable mechanism which will so coordinate these operations. However, for the purpose of illustration, the drawings show one form of control mechanism well adapted for this purpose. This mechanism is illustrated in the left hand portion of FIG. 1. It is housed within the frame of the machine and functions through the intermediary of the shaft 25 to bring about the results stated.

Mounted for rotation at the left hand end of the machine, FIG. 1, is a metering and controlling shaft 37 fixed against longitudinal movement. Near the opposite ends of this shaft are supported two index heads 38 and 39. These heads are secured to sleeves 40 and 41. Each of these index heads carries a plurality of pins 42, shown best in FIG. 1, which are adjusted to be of graduated lengths and they serve to control the arc of oscillation of the common arbor 2.3 and the cores carried thereby. These pins are adapted for cooperation with limiting stops 43 and 44 fixed on a worm rod 45 which is free for longitudinal reciprocation and locked against rotation. This rod carries a worm 46, meshing with a worm wheel 47 carried by a shaft 25a which is aimed with the shaft 25. Between the shafts 25 and 25a is interposed a conventional electro magnetic clutch 48.

During the winding operation of any particular layer of wire onto each of the core sections, the shaft 25 is driven through the electro magnetic clutch 48 from the motor 21 through a belt drive 49 to a gear train 50, which in turn has driving connection with the shaft 25a. As this latter shaft is rotated, it drives the shaft 25 through the clutch 48 to slowly oscillate the arbor 23 to present successive portions of each coil section C to the Winding wire until the predetermined axial length of that particular layer is attained. While this is being accomplished, the shaft 25a is operating through the worm wheel 47 to longitudinally shift the limiting worm rod 45. The parts i are so adjusted and synchronized that by the time the winding of that particular layer has been completed, the corresponding stop 44 engages the 'alined index pin 42.. Continued travel of the stop 44 then moves the index head 39 and its sleeve 41 in an upward direction, as viewed in FIG. 1, until a conical portion 51 on said sleeve engages with an actuates a micro switch 52. This switch is interlocked through appropriate electrical connections with the electro magnetic clutch 48 and a fly back motor 53 which has a link chain connection 54 with the shaft 25. As soon as this occurs, the fly back motor 53 acts upon the shaft 25 to oscillate the crank 24 in a retrograde direction, so that the common arbor 23 is returned to substantially the point of the commencement of its original winding. The respective index limiting pins 42 control this retrograde movement, so that, when the next layer of winding starts, such start will be in advance of the start of the previous layer.

The mechanism of this invention operates at high speed and unless some means were provided to slow down the retrograde movement of the arbor at the end of its retrograde oscillation, undesirable jar or vibration might occur. It should be noted in this connection that, when the stop 44 engages the index pin 42 as described, which causes the energizing of the electric clutch 48, that clutch will serve to drive the shaft 25a in a direction to reciprocate the worm rod downwardly, in FIG. 1, so that the stop 43 engages with the alined pin 42.. [In so doing, it moves the sleeve 4i! in a downward direction causing a conical portion 56 to first act upon a slow down micro switch 57, which is interlocked through appropriate electric connections with the fly back motor 53 and the electro magnetic clutch 48, to effect the slow down referred to and immediately thereafter said conical part 56 engages with the micro switch 58 which, through appropriate electric connections, deenergizes the fly back motor 53 and connects the gear train 50 with the shaft 25a so that the common arbor can be again oscillated in winding direction.

Between the winding of each layer, the index head shaft 37 is rotatably stepped by a solenoid 59 to bring the next shorter index pin 42 in alinement with the stops 43 and 44, so as to condition the parts for the proper winding of the next layer upon the core section. This rotary stepping of the shaft 37 is accomplished by the solenoid 5 9 controlled by a switch 59a, actuated by a cam on the shaft 25a. The solenoid has a crank connection with the shaft and serves to successively rotate the shaft the necessary angular degrees to accomplish the results stated, said shaft being temporarily fixed in each successive position by a star wheel 60 normally locked against rotation by a detent on a pivoted link 61. Otherwise switches entering into the interlocking of the different parts for synchronized operation may also be mounted, as shown, on the shaft 25a.

The operations described are repeated for the winding of successive layers upon the cores and the predetermined number of layers of windings is controlled in this machine by a cam 62 mounted on the shaft 37 and acting upon a micro switch 613. An additional cam 64 may be provided to act upon a micro switch 65 which serves to reset the entire mechanism for the winding of another set of core sections to be substituted in the machine on a pre-loaded common arbor.

For convenience, the machine may be provided with a counter 66 for indicating the number of layers as they are wound upon the core sections. A second indicator (:7 may be provided to actually count the number of coils applied to each core section.

In the winding of coil sections of the character referred to, it is essential that all windings be accomplished in the same direction. This is the purpose of the so-called fly back, re-indexing operation to which reference has been made. It is during this operation that the wire, after completing the last coil of any particular layer, is carried back to the point where it is desired to have the next wind ing commence. As this last helical winding is iormed on the core for any particular layer, the core sections on the common arbor 223 oscillate into retracted position. During this retroegrade or i e-indexing movement, the wire is returned to the index point where the winding for the next layer is to commence. The return of the wire is accomplished by the motion of the arbor crank and the path of the wire is made either straight or helically depending upon Whether the flier arms are stopped momentarily or continue to rotate. At this particular instant a pin 63, shown in FIG. 3, engages said wire at each core and holds the wire taut at such point of starting until a few turns of the next succeeding layer have been applied to each core, whereupon the pin is retracted and the winding of the latter layer proceeds. The position of the pin 68 is cont-rolled by a solenoid 69 which is interlocked with the other operating parts of the machine to act in timed relation therewith.

In the foregoing description of the operating and control mechanism, particular parts have been shown for the accomplishment of these purposes. However, it is to be understood that any appropriate control mechanism well within the skill of those [familiar with this art, may be employed with the fundamental parts of the machine shown in FIG. 4, without departing from this invention.

The foregoing detailed description sets forth the invention in its preferred practical forms, but the invention is to be understood as fully commensurate with the appended claims.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. A machine for winding toroidal television vertical deflection coils comprising:

(a) a plurality of wire winding flier arms supported for rotation on parallel spaced apart axes with means to simultaneously rotate them,

(b) a common arbor for rigidly supporting a plurality of core sections cooperative relation with a corresponding number of said flier Winding arms and adapted to be individually Wound with wire supplied by the latter, and

(c) means for imparting an oscillatory movement to said arbor about an axis to maintain the center of curvature of each of the core sections in substantial alinement with the axis of rotation of the corresponding flier arm.

2. A machine according to claim 1, wherein the means for imparting oscillatory movement to the common arbor embodies an oscillatory crank, and a quick twist lock assembly sleeve on said crank detachably engaging the arbor to permit of rapid substitution of successive prethe several hollow shafts for rotating the several flier arms at a predetermined speed ratio relative to that of fihe motor.

5. A machine according to claim 1 comprising means for varying the angle of oscillatory movement of the common arbor for successive layer s/of windings applied to the core sections.

6. A machine for winding toroidal television vertical deflection coils comprising:

(a) a plurality of wire Winding flier arms supported for rotation on spaced parallel axes with means to simultaneously rotate them,

(b) a common arbor with means to rigidly support on said arbor a plurality of spaced apart coaxial arcuate core sections in cooperative Winding relation with the respective flier arms,

(0) means for imparting to said arbor, as the winding proceeds, oscillatory movement between predetermined termini about an axis at all times coaxial with the centers of curvature of all of said arcuatei core sections.

7. A machine according to claim 6, comprising means to permit said arbor with the core sections supported thereon to be removed as a unit from the machine and a like unit substitute-d therefor in the machine.

8. A machine according to claim 6, wherein the co. mon arbor is positioned parallel to its axis oi oscillation which is also the axis of the centers of curvature of all of said arcuate core sections, said common arbor being radially spaced from said axis.

References Cited in the file of this patent UNITED STATES PATENTS 1,250,436 Curry Dec. 18, 1917 2,315,904 Pizzi et a1 Apr. 6, 1943 2,719,722 Nickless Oct. 4, 1955 2,773,651 Whipple Dec. 11, 1956 2,821,401 Eben et al Jan. 28, 1958 FOREIGN PATENTS 233,973 Australia June 2, 1961 525,941 Germany July 4, 1932 

1. A MACHINE FOR WINDING TOROIDAL TELEVISION VERTICAL DEFLECTION COILS COMPRISING: (A) A PLURALITY OF WIRE WINDING FLIER ARMS SUPPORTED FOR ROTATION ON PARALLEL SPACED APART AXES WITH MEANS TO SIMULTANEOUSLY ROTATE THEM, (B) A COMMON ARBOR FOR RIGIDLY SUPPORTING A PLURALITY OF CORE SECTIONS IN COOPERATIVE RELATION WITH A CORRESPONDING NUMBER OF SAID FLIER WINDING ARMS AND ADAPTED TO BE INDIVIDUALLY WOUND WITH WIRE SUPPLIED BY THE LATTER, AND (C) MEANS FOR IMPARTING AN OSCILLATORY MOVEMENT TO SAID ARBOR ABOUT AN AXIS TO MAINTAIN THE CENTER OF 